Motorola CPU32 Betriebsanweisung Seite 69

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68 CPU32 Emulation
Chapter 5: Connecting and Configuring the Emulator
Designing a Target System for the Emulator
CONFIG2 pin
The CONFIG2 pin on CPU32+ processors shares a pin with the
processor FREEZE output. The emulator can pull this line down and
cause the CPU32+ to power up in Slave Mode with the internal CPU
disabled. To ensure that CONFIG2 is high at reset, the target should
supply sufficient pullup current to drive the FREEZE input on the
emulator. Loading for the FREEZE pin (and all BDM pins) is described
in “Emulation module—electrical characteristics” on page 227.
Enabling BDM
Your target system does not need to enable background debug mode.
If the emulator is connected and turned on before you turn on the
target system, the emulator will enable BDM.
If you connect the emulator after you turn on the target system, the
emulator will enable BDM when the target is reset.
If you turn on the emulation probe while it is connected to a running
target system, the HPE3458A emulation probe will reset the target
system.
To test the emulator
If this is the first time that you have used the emulator, you should run
the built-in performance verification test before you connect to a target
system. Refer to page 174 for information on performance verification.
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